Patents by Inventor Marcel Lefort

Marcel Lefort has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4275184
    Abstract: The invention provides organosilicon compounds of the formula: ##STR1## in which: n is 1, 2 or 3;each R, which may be identical or different, is a monovalent organic group which contains a carbon-carbon double bond and from 2 to 10 carbon atoms;each R.sub.1, which may be identical or different, is a straight or branched alkyl radical optionally substituted by one or more halogen atoms or cyano groups; an aryl radical or an alkylaryl radical optionally substituted by one or more halogen atoms;R.sub.2 is a straight or branched divalent alkylene or alkylidene radical possessing up to 4 carbon atoms;X is a divalent radical consisting of, or containing, at least one hetero-atom selected from oxygen, sulphur and nitrogen atoms, the radical being attached to the radical R.sub.2 via a said hetero-atom;G is an organic radical of valency (m+1) possessing from 1 to 30 carbon atoms;m is 1, 2 or 3;and each Y, which may be identical or different, is a functional group selected from ##STR2## wherein R.sub.
    Type: Grant
    Filed: October 26, 1979
    Date of Patent: June 23, 1981
    Assignee: Rhone-Poulenc Industries
    Inventors: Michel Bargain, Marcel Lefort
  • Patent number: 4263436
    Abstract: Novel organosilicon compounds and processes for their preparation are disclosed. The compounds are di- and trisilanes of the formula:(R--Si (R.sub.1).sub.2 --G--Y--.sub.n Qin which R represents a radical containing one double ethylene bond, R.sub.1 represents a hydrocarbon radical, G represents a carbocyclic aromatic or heterocyclic radical, Y represents CONH or COO, Q represents an organic radical and n is an integer equal to 2 or 3. The compounds are useful in preparing thermoplastic elastomers.
    Type: Grant
    Filed: September 18, 1978
    Date of Patent: April 21, 1981
    Assignee: Rhone-Poulenc Industries
    Inventors: Michel Bargain, Marcel Lefort
  • Patent number: 4213914
    Abstract: The invention provides organosilicon compounds of the formula: ##STR1## in which: n is 1, 2 or 3;each R, which may be identical or different, is a monovalent organic group which contains a carbon-carbon double bond and from 2 to 10 carbon atoms;each R.sub.1, which may be identical or different, is a straight or branched alkyl radical optionally substituted by one or more halogen atoms or cyano groups; an aryl radical or an alkylaryl radical optionally substituted by one or more halogen atoms;R.sub.2 is a straight or branched divalent alkylene or alkylidene radical possessing up to 4 carbon atoms;X is a divalent radical consisting of, or containing, at least one hetero-atom selected from oxygen, sulphur and nitrogen atoms, the radical being attached to the radical R.sub.2 via a said hetero-atom;G is an organic radical of valency (m+1) possessing from 1 to 30 carbon atoms;m is 1, 2 or 3;and each Y, which may be identical or different, is a functional group selected from: --NO.sub.
    Type: Grant
    Filed: December 1, 1978
    Date of Patent: July 22, 1980
    Assignee: Rhone-Poulenc Industries
    Inventors: Michel Bargain, Marcel Lefort
  • Patent number: 4208342
    Abstract: Novel organosilicon compounds and processes for their preparation are disclosed. The compounds are di- and trisilanes of the formula(R--Si (R.sub.1).sub.2 --G--Y--.sub.n Qin which R represents a radical containing one double ethylene bond, R.sub.1 represents a hydrocarbon radical, G represents a carbocyclic aromatic or heterocyclic radical, Y represents CONH or COO, Q represents an organic radical and n is an integer equal to 2 or 3. The compounds are useful in preparing thermoplastic elastomers.
    Type: Grant
    Filed: July 20, 1977
    Date of Patent: June 17, 1980
    Assignee: Rhone-Poulenc Industries
    Inventors: Michel Bargain, Marcel Lefort
  • Patent number: 4180515
    Abstract: Novel organosilicon compounds containing various functional groups and processes for their preparation are disclosed. The compounds are silanes represented by the following general formula: ##STR1## wherein R represents a hydrocarbon radical containing a carbon-carbon double bond; R.sub.1 represents a hydrocarbon radical; G represents a divalent carbocyclic aromatic or heterocyclic radical; Y represents a group such as Cl, COCl, or COOH; and, n represents an integer equal to 1 or 2.
    Type: Grant
    Filed: July 20, 1977
    Date of Patent: December 25, 1979
    Assignee: Rhone-Poulenc Industries
    Inventors: Michel Bargain, Marcel Lefort
  • Patent number: 4147711
    Abstract: The invention provides organosilicon compounds of the formula: ##STR1## in which: N IS 1, 2 OR 3;Each R, which may be identical or different, is a monovalent organic group which contains a carbon-carbon double bond and from 2 to 10 carbon atoms;Each R.sub.1, which may be identical or different, is a straight or branched alkyl radical optionally substituted by one or more halogen atoms or cyano groups; an aryl radical or an alkylaryl radical optionally substituted by one or more halogen atoms;R.sub.2 is a straight or branched divalent alkylene or alkylidene radical possessing up to 4 carbon atoms;X is a divalent radical consisting of, or containing, at least one hetero-atom selected from oxygen, sulphur and nitrogen atoms, the radical being attached to the radical R.sub.2 via a said hetero-atom;G is an organic radical of valency (m+1) possessing from 1 to 30 carbon atoms;M is 1, 2 or 3;And each Y, which may be identical or different, is a functional group selected from: --NO.sub.
    Type: Grant
    Filed: November 16, 1977
    Date of Patent: April 3, 1979
    Assignee: Rhone-Poulenc Industries
    Inventors: Michel Bargain, Marcel Lefort
  • Patent number: 4145508
    Abstract: Novel polysiloxane thermoplastic elastomers and processes for their preparation are disclosed. The elastomers are obtained by reaction of .alpha.,.omega.-dihydrogenpolysiloxane with a diethylene silicon compound.
    Type: Grant
    Filed: July 20, 1977
    Date of Patent: March 20, 1979
    Assignee: Rhone-Poulenc Industries
    Inventors: Michel Bargain, Marcel Lefort
  • Patent number: 4088670
    Abstract: The invention provides organosilicon compounds of the formula: ##STR1## in which: N IS 1, 2 OR 3;Each R, which may be identical or different, is a monovalent organic group which contains a carbon-carbon double bond and from 2 to 10 carbon atoms;Each R.sub.1, which may be identical or different, is a straight or branched alkyl radical optionally substituted by one or more halogen atoms or cyano groups; an aryl radical or an alkylaryl radical optionally substituted by one or more halogen atoms;R.sub.2 is a straight or branched divalent alkylene or alkylidene radical possessing up to 4 carbon atoms;X is a divalent radical consisting of, or containing, at least one hetero-atom selected from oxygen, sulphur and nitrogen atoms, the radical being attached to the radical R.sub.2 via a said hetero-atom;G is an organic radical of valency (m+ l) possess from 1 to 30 carbon atoms;m is 1, 2 or 3;And each Y, which may be identical or different, is a functional group selected from: --NO.sub.
    Type: Grant
    Filed: September 29, 1975
    Date of Patent: May 9, 1978
    Assignee: Rhone-Poulenc Industries
    Inventors: Michel Bargain, Marcel Lefort
  • Patent number: 4059608
    Abstract: A process for preparing hydrogenosilanes by hydrogenating disilanes, especially halogenated disilanes, under relatively mild reaction conditions is disclosed. The hydrogenation is effected in the presence of a catalytic system containing an aprotic compound and a nickel catalyst which consists essentially of finely divided nickel and is obtained by preliminary or in situ reduction of a nickel compound.
    Type: Grant
    Filed: March 4, 1977
    Date of Patent: November 22, 1977
    Assignee: Rhone-Poulenc Industries
    Inventors: Raymond Calas, Jacques Dunogues, Gerard Deleris, Marcel Lefort, Christian Simonnet
  • Patent number: 4018871
    Abstract: Trichlorosilane is dismutated into dichlorosilane in the presence of an .alpha.-pyrrolidone which is N-substituted by a hydrocarbon radical as catalyst.
    Type: Grant
    Filed: November 4, 1975
    Date of Patent: April 19, 1977
    Assignee: Rhone-Poulenc Industries
    Inventors: Gilbert Marin, Marcel Lefort
  • Patent number: 3980686
    Abstract: Dichlorosilane and phenyltrichlorosilane are prepared in good yields by reacting trichlorosilane and diphenyldichlorosilane in the presence of aluminium chloride, as catalyst, and a small proportion of a co-catalyst which is selected from hydrochloric acid and alumina and mixtures thereof, isolating the dichlorosilane from the reaction medium as it is formed and isolating the phenyltrichlorosilane obtained at the end of the reaction.
    Type: Grant
    Filed: July 23, 1975
    Date of Patent: September 14, 1976
    Assignee: Rhone-Poulenc Industries
    Inventors: Marcel Lefort, Gilbert Marin
  • Patent number: 3943099
    Abstract: Halogenated vinyl resins are redendered less susceptible to yellowing on heating by the incorporation of stannic chloride as well as a diorgano-tin dimercaptide.
    Type: Grant
    Filed: October 2, 1974
    Date of Patent: March 9, 1976
    Assignee: Rhone-Poulenc Textile
    Inventors: Georges Bakassian, Michel Gay, Marcel Lefort